"use client";

import { useState } from "react";
import { Trash2, Plus, RefreshCw, Pencil } from "lucide-react";
import { toast } from "sonner";
import {
  Table, TableBody, TableCell, TableHead, TableHeader, TableRow,
} from "@/components/ui/table";
import { Button } from "@/components/ui/button";
import { Badge } from "@/components/ui/badge";
import { Input } from "@/components/ui/input";
import { Skeleton } from "@/components/ui/skeleton";
import {
  Select, SelectContent, SelectItem, SelectTrigger, SelectValue,
} from "@/components/ui/select";
import {
  usePrecedents,
  useDeletePrecedent,
  useReExtractHalachot,
  type Precedent,
  type PracticeArea,
} from "@/lib/api/precedent-library";
import { PRACTICE_AREAS, PRECEDENT_LEVELS, practiceAreaShort } from "./practice-area";
import { PrecedentUploadSheet } from "./precedent-upload-sheet";
import { PrecedentEditSheet } from "./precedent-edit-sheet";

function formatDate(iso: string | null) {
  if (!iso) return "—";
  try {
    return new Date(iso).toLocaleDateString("he-IL");
  } catch {
    return iso;
  }
}

function StatusPill({ p }: { p: Precedent }) {
  if (p.extraction_status === "failed") {
    return <Badge variant="outline" className="bg-danger-bg text-danger border-danger/40">נכשל</Badge>;
  }
  if (p.extraction_status !== "completed") {
    return <Badge variant="outline" className="bg-rule-soft text-ink-muted">בעיבוד</Badge>;
  }
  if (p.halacha_extraction_status !== "completed") {
    return <Badge variant="outline" className="bg-gold-wash text-gold-deep">מחלץ הלכות</Badge>;
  }
  if (p.halachot_count === 0) {
    return <Badge variant="outline">ללא הלכות</Badge>;
  }
  return (
    <Badge
      variant="outline"
      className="bg-gold-wash text-gold-deep border-gold/40"
    >
      {p.approved_count}/{p.halachot_count} מאושרות
    </Badge>
  );
}

function PrecedentRow({
  p, onEdit,
}: {
  p: Precedent;
  onEdit: (id: string) => void;
}) {
  const del = useDeletePrecedent();
  const reExtract = useReExtractHalachot();

  const onDelete = async () => {
    if (!window.confirm(`למחוק את ${p.case_number}? cascade ימחק את ה-chunks וההלכות.`)) return;
    try {
      await del.mutateAsync(p.id);
      toast.success("נמחק");
    } catch (e) {
      toast.error(e instanceof Error ? e.message : "שגיאה");
    }
  };

  const onReExtract = async () => {
    try {
      await reExtract.mutateAsync(p.id);
      toast.success("חילוץ הלכות החל");
    } catch (e) {
      toast.error(e instanceof Error ? e.message : "שגיאה");
    }
  };

  return (
    <TableRow className="border-rule hover:bg-gold-wash/30">
      <TableCell className="font-semibold text-navy" dir="ltr">
        {p.case_number}
      </TableCell>
      <TableCell className="text-ink">
        <div className="font-medium">{p.case_name || "—"}</div>
        <div className="text-[0.72rem] text-ink-muted">{p.court || "—"}</div>
      </TableCell>
      <TableCell className="text-ink-muted">{formatDate(p.date)}</TableCell>
      <TableCell>
        {p.practice_area ? (
          <Badge variant="outline" className="bg-navy-soft/40 text-navy border-navy/30">
            {practiceAreaShort(p.practice_area)}
          </Badge>
        ) : (
          <span className="text-ink-light">—</span>
        )}
      </TableCell>
      <TableCell className="text-ink-muted text-[0.78rem]">
        {p.precedent_level || "—"}
      </TableCell>
      <TableCell>
        <StatusPill p={p} />
      </TableCell>
      <TableCell className="text-end">
        <div className="flex items-center gap-1 justify-end">
          <Button
            variant="ghost" size="sm" onClick={() => onEdit(p.id)}
            aria-label={`ערוך את ${p.case_number}`}
            title="ערוך פרטים"
            className="text-ink-muted hover:text-navy"
          >
            <Pencil className="w-4 h-4" />
          </Button>
          <Button
            variant="ghost" size="sm" onClick={onReExtract}
            disabled={reExtract.isPending}
            aria-label="חלץ הלכות מחדש"
            title="חלץ הלכות מחדש"
            className="text-ink-muted hover:text-navy"
          >
            <RefreshCw className="w-4 h-4" />
          </Button>
          <Button
            variant="ghost" size="sm" onClick={onDelete}
            disabled={del.isPending}
            aria-label={`מחק את ${p.case_number}`}
            className="text-danger hover:text-danger hover:bg-danger-bg"
          >
            <Trash2 className="w-4 h-4" />
          </Button>
        </div>
      </TableCell>
    </TableRow>
  );
}

export function LibraryListPanel() {
  const [practiceArea, setPracticeArea] = useState<PracticeArea>("");
  const [precedentLevel, setPrecedentLevel] = useState("");
  const [search, setSearch] = useState("");
  const [uploadOpen, setUploadOpen] = useState(false);
  const [editingId, setEditingId] = useState<string | null>(null);

  const { data, isPending, error } = usePrecedents({
    practiceArea: practiceArea || undefined,
    precedentLevel: precedentLevel || undefined,
    search: search.trim() || undefined,
    limit: 200,
  });

  return (
    <div className="space-y-4">
      <div className="flex items-end gap-3 flex-wrap">
        <div className="flex-1 min-w-[200px]">
          <label className="text-[0.78rem] text-ink-muted">חיפוש (מספר תיק / שם / תקציר)</label>
          <Input
            value={search}
            onChange={(e) => setSearch(e.target.value)}
            placeholder="עע&quot;מ 3975/22"
            dir="rtl"
          />
        </div>

        <div className="min-w-[180px]">
          <label className="text-[0.78rem] text-ink-muted">תחום</label>
          <Select value={practiceArea || "_all"} onValueChange={(v) => setPracticeArea(v === "_all" ? "" : v as PracticeArea)}>
            <SelectTrigger><SelectValue placeholder="הכל" /></SelectTrigger>
            <SelectContent>
              <SelectItem value="_all">הכל</SelectItem>
              {PRACTICE_AREAS.map((a) => (
                <SelectItem key={a.value} value={a.value}>{a.label}</SelectItem>
              ))}
            </SelectContent>
          </Select>
        </div>

        <div className="min-w-[170px]">
          <label className="text-[0.78rem] text-ink-muted">רמת תקדים</label>
          <Select value={precedentLevel || "_all"} onValueChange={(v) => setPrecedentLevel(v === "_all" ? "" : v)}>
            <SelectTrigger><SelectValue placeholder="הכל" /></SelectTrigger>
            <SelectContent>
              <SelectItem value="_all">הכל</SelectItem>
              {PRECEDENT_LEVELS.map((l) => (
                <SelectItem key={l.value} value={l.value}>{l.label}</SelectItem>
              ))}
            </SelectContent>
          </Select>
        </div>

        <Button onClick={() => setUploadOpen(true)} className="bg-navy text-parchment hover:bg-navy-soft">
          <Plus className="w-4 h-4 me-1" />
          העלאת פסיקה
        </Button>
      </div>

      {error ? (
        <div className="rounded bg-danger-bg border border-danger/40 px-6 py-5 text-danger text-center">
          {error.message}
        </div>
      ) : (
        <div className="rounded-lg border border-rule bg-surface shadow-sm overflow-hidden">
          <Table>
            <TableHeader className="bg-rule-soft/60">
              <TableRow className="border-rule">
                <TableHead className="text-navy text-right">מס׳ / מראה מקום</TableHead>
                <TableHead className="text-navy text-right">שם / ערכאה</TableHead>
                <TableHead className="text-navy text-right">תאריך</TableHead>
                <TableHead className="text-navy text-right">תחום</TableHead>
                <TableHead className="text-navy text-right">רמה</TableHead>
                <TableHead className="text-navy text-right">הלכות</TableHead>
                <TableHead className="text-navy" />
              </TableRow>
            </TableHeader>
            <TableBody>
              {isPending ? (
                [...Array(5)].map((_, i) => (
                  <TableRow key={i} className="border-rule">
                    {[...Array(7)].map((_, j) => (
                      <TableCell key={j}>
                        <Skeleton className="h-5 w-full" />
                      </TableCell>
                    ))}
                  </TableRow>
                ))
              ) : !data?.items.length ? (
                <TableRow className="border-rule">
                  <TableCell colSpan={7} className="text-center text-ink-muted py-10">
                    אין פסיקה בקורפוס. העלה את פסק הדין הראשון.
                  </TableCell>
                </TableRow>
              ) : (
                data.items.map((p) => (
                  <PrecedentRow key={p.id} p={p} onEdit={setEditingId} />
                ))
              )}
            </TableBody>
          </Table>
        </div>
      )}

      <PrecedentUploadSheet open={uploadOpen} onOpenChange={setUploadOpen} />
      <PrecedentEditSheet
        caseLawId={editingId}
        onOpenChange={(open) => { if (!open) setEditingId(null); }}
      />
    </div>
  );
}